| 摘要 |
A hydraulic cylinder device with a cushion member of an aperture ring shape given in the present invention includes: a cylinder which includes a hollow part; a rod which is installed to be able to slide inside the cylinder; a piston which is fixed at one end of the rod and is placed to be able to slide while being in touch with the inner circumferential surface of the cylinder; a piston nut which is fixed to the rod while supporting one side of the piston to prevent the piston from being separated from the rod; a head cover which is fixed at one side of the cylinder and has a passage for supplying pressure oil from the outside to the piston. The hydraulic cylinder device further includes: a cushion guide unit which is formed at one end of the rod and has an outer diameter smaller than the position where the piston is combined; an aperture ring which is combined to the outer circumference of the cushion guide unit not to be separated from the cushion unit, is at a distance from the outer circumference of the cushion guide unit, and has a ring shape; a spring one end of which supports the aperture, the other end of which is supported on the piston nut, and which applies an elastic restoring force to the aperture ring in a direction away from the piston; and an entry groove which is placed on the head cover and accommodates the cushion guide unit. The entry groove is connected to the passage. |
